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If I connect the crossfire rx go pixhawk like in the diagram how do I set the channels on the xfire rx? And do I need to connect ch 1 of the the xfire to pixhawks rc input still? I would like to have control witj my sticks as well as mission planner

select MAVLink for output 8 then go one page back and enable RC over MAVLink. Then you don't need to feed PPM anymore

- improved: CRC protection improved to make the system even more resistant against picking up invalid frames
- improved: Dynamic power mode hysterisis tuned. 2s delay added for reducing power level. Increase power level only on burst frame loss not on single frame lost
- improved: RX automatically binds to the transmitter after successful firmware update over the air if it wasn't bound before.

For those wo want to use the TBS CROSSFIRE as telemetry radio here is a sample cable to interface a PIXHAWK FC.Attachment 70389
If you use TBS BLACKBOX and TBS Crossfire, please only connect the TBS CROSSFIRE to the FC. It will forward all required data to the TBS BLACKBOX. An instruction on how to set up your FC is written inside the TBS BLACKBOX manual on page 4 and following. It's the same setup no matter if you have it connected to the TBS CROSSFIRE or TBS BLACKBOX. http://www.team-blacksheep.com/tbs-blackbox-manual.pdf

I will send my next few days on writing down documentation to make it more easy how everything needs to be connected together.

A BST Connection between the Crossfire and the Blackbox, like how it's being described on Page 14 of the TBS Crossfire Manual, and a custom Wire Harness between the Blackbox and the Pixhack, like how it's being described on Page 4 of the TBS Blackbox Manual, is not enough to get Mavlink Data moving between them?
We HAVE to make this Servo Wire Harness in order to establish a DIRECT Connection between the Pixhack and the Crossfire?

Where's the use for the Blackbox that was once communicated as a necessity if it's not sitting BETWEEN the Pixhack and the Crossfire but at the END of it?
All it now does is recording which is already happening on either the Pixhack or, with Telemetry being sent Home, on the Ground Station.